package com.king.netty.codec2;

import com.king.netty.codec.StudentPOJO;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.util.Date;
import java.util.Random;

/**
 * @author unidentifiable
 * @date 2021/2/7
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    /**
     * 通道就绪 触发点
     * @param ctx 上下文对象
     * @throws Exception
     */
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        MyDataInfo.MyMessage message = null;
        // 随机发送Student或者Worker对象
        int next = new Random().nextInt(3);
        if (0 == next){
            message = MyDataInfo.MyMessage.newBuilder()
                    .setDataType(MyDataInfo.MyMessage.DataType.StudentType)
                    .setStudent(MyDataInfo.Student.newBuilder().setId(5).setName("老五").build())
                    .build();
        }else{
            message = MyDataInfo.MyMessage.newBuilder()
                    .setDataType(MyDataInfo.MyMessage.DataType.WorkerType)
                    .setWorker(MyDataInfo.Worker.newBuilder().setAge(6).setName("老六").build())
                    .build();
        }
        ctx.writeAndFlush(message);
    }

    /**
     * 通道读取事件 触发点
     * @param ctx
     * @param msg
     * @throws Exception
     */
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf)msg;
        System.out.println("服务器回复的消息：" + buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器地址：" + ctx.channel().remoteAddress());
//        super.channelRead(ctx, msg);
    }

    /**
     * 异常处理
     * @param ctx
     * @param cause
     * @throws Exception
     */
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
//        super.exceptionCaught(ctx, cause);
    }
}
